Positioning device used for assembling lower beam assembly of outer portal frame

Abstract

The invention discloses a positioning device used for assembling a lower beam assembly of an outer portal frame. The positioning device comprises a base and a long shaft, wherein the two ends of the base are fixedly equipped with shaft brackets used for supporting the long shaft symmetrically; the two ends of the base at one side of each shaft bracket are symmetrically and fixedly equipped with oil cylinder supporting base positioning parts for positioning oil cylinder supporting bases in the lower beam assembly of the outer portal frame; portal frame supporting base positioning parts for positioning portal frame supporting bases in the lower beam assembly of the outer portal frame are symmetrically and fixedly arranged on the base between the oil cylinder supporting base positioning parts; and a quick clamp mechanism is fixedly arranged on the base at the other side of each shaft bracket. The positioning device is used for positioning each part of the lower beam assembly of the outer portal frame, and then directly performing welding operation, so that the whole process only needs one person to complete operation. Operation for marking each part assembling position of the lower beam assembly is cancelled; and moreover, coordinated operation of two persons is not needed, and only one person can complete the whole assembling process, so that assembling efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of cargo forks, in particular to a positioning device for assembling the lower beam assembly of an outer mast. Background technique [0002] The mechanism used to lift goods in a forklift is a mast, which is composed of an inner mast, an outer mast, a fork frame, a fork, a sprocket, a chain, a lifting cylinder and a tilting cylinder. The fork and the fork hung on the fork frame move up and down along the inner mast with the help of the fork frame rollers, driving the goods to lift or descend. The lower end of the outer mast is hinged on the vehicle frame, and the middle part is hinged with the tilting oil cylinder. Due to the expansion and contraction of the tilting cylinder, the mast can be tilted forward and backward (the inclination is generally 6 to 12 degrees), so that the cargo is stable during fork lifting and handling. [0003] The lower beam assembly structure of the electric double drive 2-3.5T o...

AI Technical Summary

Problems solved by technology

Due to the lack of tooling for each component in the assembly process, the current workshop assembly is mainly assembled by scribing. It is necessary to scribing the position and size of the parts. One person fixes and the other assembles welding. It takes a lot of time and requires two people to operate. High efficiency Low; and the assembly accuracy is poor. The coaxiality of the mast support and the opening size of the mast support in the lower beam assembly structure of the outer mast are relatively high. When assembling, a tape measure is used for measurement, and the accuracy is generally about 1mm, which is difficult to meet the drawing requirements , so that the quality of the assembled product cannot be guaranteed

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